Restore interface changes due to server DB sharding

[7hong13]

What this PR does / why we need it?

This PR restores passing sharding keys to the SDK in accordance with yorkie-team/yorkie#776.

Any background context you want to provide?

What are the relevant tickets?

• Restore interface changes due to server DB sharding yorkie-js-sdk#740

Fixes #

Checklist

• Added relevant tests or not required
• Didn't break anything

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (8661963) 79.62% compared to head (8ceaa2d) 79.59%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #155      +/-   ##
==========================================
- Coverage   79.62%   79.59%   -0.04%     
==========================================
  Files          63       63              
  Lines        3853     3847       -6     
  Branches      603      603              
==========================================
- Hits         3068     3062       -6     
  Misses        459      459              
  Partials      326      326              

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